Alger (/ˌældʒər/ AL-jər) is an unincorporated community in Arenac County in the U.S. state of Michigan.

As an unincorporated community, Alger has no legally defined boundaries or population statistics of its own but does have its own post office with the 48610 ZIP Code.

[3] Alger was established in 1883 as a station at the junction between the Michigan Central and Detroit, Bay City & Alpena railroads.

The settlement was platted in 1884 by John Stoughton Newberry and Russell A. Alger, the latter the namesake of the community and later the 20th Governor of Michigan.

[5] Alger is located in the northwest of Arenac County, in Moffatt Township.